HP Apollo 9000 400t Manual de Serviço descarregar pdf (Página 94)

4-24 Fault Isolation

For example, if the system’s memory conﬁguration consists of two 4-MB boards and

two 2-MB boards, and Self Test reports an error at Megabyte 5, the defective board

would be the 4-MB board in slot 0B.

When you identify a defective memory board, follow the memory board replacement

procedure in Chapter 5 to replace it.

4.3.2 MD Level LED Status Codes

At the MD level, while in Service mode, the front panel LEDs display system status

codes. Table 4-3 lists the codes and their meanings.

Table 4-3. MD Status LED Codes

LED Display

(E through H Flashing) System Status

Hex

Code

Keyboard Wait Loop

Waiting at MD Prompt

Waiting for Disk

Waiting for Net Transmit

Waiting for Volunteer Response

Waiting for Net Receive

S = Service Mode Indicator P = Power-OK Indicator

On = Service Mode, Not On = Normal Mode = LED On

4.3.3 Test Stimulus Code Diagnostics

TSC diagnostics reside in the /SAU directory on the system disk. These diagnostics

thoroughly test the components of the CPU board, the keyboard, and the EtherLAN

network. TSC diagnostics report a test failure on the display and by lighting LED “A”

on the system unit’s front panel.

You can run TSC diagnostics from a system’s disk, from another disk on the network,

or (if the display is inoperative) through an SIO line to another system (refer to Ap-

pendix D for information about using the SIO line). For more information about TSC

diagnostics, refer to HP 9000 Series 200/300 Computers Test Tools Manual

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HP Apollo 9000 400t Manual de Serviço Página 94